TXT format is the simplest text file standard that doesn’t support formatting. Such file contains text characters, tab and line feed characters. Being outdated in functionality it has one major advantage - compact file size, comfortable for sharing, data export/import. It supports various charsets (DOS, WIN, ISO, KOI-8). The charset can be changed to make TXT file compatible with any text reader. The lack of formatting is solved by setting up format params in the reader program.